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Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: Schistes Lustrés in a hyper-extended continental margin setting and reinterpretation of the limit between the Mont Fort and Tsaté nappes (Middle and Upper Penninics, Western Swiss Alps)

Fig. 3

Lithologies of the ophiolite-bearing Schistes Lustrés of the Combin zone. a Characteristic aspect of the Série Grise calcschists; Les Haudères [2′604′860/1′104′050]. b Graded beds of greenish to violaceous volcanosedimentary arkose interbedded in calcschists; Adlerflüe [2′620′290/1′110′560], Turtmann valley. c Decimetric level of greenish calcitic marble outcropping at a few meters from a plurihectometric-long ophiolitic lens (serpentinites, metabasites) of the Série Grise. Detrital mm-sized grains of ophiolitic material are visible under the pencil; Chanrion hut area [2′595′195/1′087′695], Bagnes valley. d Arkosic calcitic marble at the contact of a hectometric-long serpentinite lens. Note the presence of cm-sized serpentinite clasts and the green color of the ophiolitic arkosic detritus; 3 m from Fig. c. e Quartzmicaschists levels (1–2 m thick) interpreted as metaradiolarites (Staub 1942c; Burri et al. 1999) and locally rich in piemontite (sometimes associated to braunite); Chanrion hut area [2′595′165/1′087′700]; Mn-garnets and blue amphiboles are visible in the same level, 200 m to the NNW. f Serpentinite breccia observed at the contact between calcschists of the Série Grise and a plurihectometric serpentinite lens marking the contact with the Série Rousse; Giétro [2′594′360/1′094′290], Bagnes valley

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